<?php
/**
 * Created by PhpStorm
 * User: Administrator
 * Date: 2016/9/21 0021
 * Time: 下午 7:12
 */

    const DISCOUNT=0.8;
    $fruit1='香蕉';
    $fruit2='苹果';
    $fruit3='橘子';
    $fruit1_num=2;
    $fruit2_num=1;
    $fruit3_num=3;
    $fruit1_price=7.99;
    $fruit2_price=6.89;
    $fruit3_price=3.99;
    $fruit1_total=$fruit1_num*$fruit1_price;
    $fruit2_total=$fruit2_num*$fruit2_price;
    $fruit3_total=$fruit3_num*$fruit3_price;
    $total=($fruit1_total+$fruit2_total+$fruit3_total)*DISCOUNT;

    $str ="<table>";
    $str .="<tr><td>商品名称</td><td>购买数量（斤）</td><td>商品价格（元/斤）</td></tr>";
    $str .="<tr><td>$fruit1</td><td>$fruit1_num</td><td>$fruit1_price</td></tr>";
    $str .="<tr><td>$fruit2</td><td>$fruit2_num</td><td>$fruit2_price</td></tr>";
    $str .="<tr><td>$fruit3</td><td>$fruit3_num</td><td>$fruit3_price</td></tr>";
    $str .="<tr><td colspan='3'>商品折扣：<span>".DISCOUNT."</span></td></tr>";
    $str .="<tr><td colspan='3'>打折后购买商品总价格：{$total}元</td></tr>";
    $str .="</table>";
    echo $str;
?>